CN106269785B - A kind of method of baking cyaniding tailings clean conversion - Google Patents
A kind of method of baking cyaniding tailings clean conversion Download PDFInfo
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- CN106269785B CN106269785B CN201610618637.6A CN201610618637A CN106269785B CN 106269785 B CN106269785 B CN 106269785B CN 201610618637 A CN201610618637 A CN 201610618637A CN 106269785 B CN106269785 B CN 106269785B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 27
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000002253 acid Substances 0.000 claims abstract description 29
- 230000018044 dehydration Effects 0.000 claims abstract description 23
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 23
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 230000003389 potentiating effect Effects 0.000 claims abstract description 8
- 150000007513 acids Chemical class 0.000 claims abstract description 6
- 238000007885 magnetic separation Methods 0.000 claims abstract description 6
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 41
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 30
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 28
- 239000012065 filter cake Substances 0.000 claims description 27
- 239000000706 filtrate Substances 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000012141 concentrate Substances 0.000 claims description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 11
- 239000004571 lime Substances 0.000 claims description 11
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 10
- 239000011707 mineral Substances 0.000 claims description 10
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 10
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 5
- 239000004566 building material Substances 0.000 claims description 5
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 5
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims 2
- 239000007921 spray Substances 0.000 claims 1
- 239000002910 solid waste Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 238000003359 percent control normalization Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000003913 materials processing Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention relates to a kind of method of baking cyaniding tailings clean conversion, including primary acids to eliminate cyanogen, one-level dehydration, two-stage acidulation except cyanogen, two level dehydration, potent oxidation remove the steps such as cyanogen, magnetic separation, wastewater treatment, the beneficial effects of the invention are as follows：Multistage subsection acidifying, oxidation are carried out to the thing containing cyanogen in baking cyaniding tailings, multistage potent dehydration removing processing, is that thing containing cyanogen is less than 0.45mg/L in leachate by its clean conversion, stockpiling standard is discharged well below national solid waste.
Description
Technical field
The present invention relates to a kind of processing method of cyanidation tailings, more particularly to a kind of method of cyanidation tailings clean conversion,
Belong to environmental protection treatment technical field.
Background technology
Baking cyaniding tailings is to utilize the solid discharged after the recyclable elements such as the extracted gold, silver and bronze sulphur of baking cyaniding technique
Discarded object, contain the oxious component such as hypertoxic cyanide and heavy metal.The annual output cyanidation tailings more than 690 of China's gold mine at present
Ten thousand tons, with the expansion of scope of the enterprise, in growth trend year by year.Tailings is stacked and increased year by year for a long time, takes a large amount of arable lands, easily
Environmental pollution is caused, how high-efficiency comprehensive utilization cyanidation tailings turn into the industry hardly possible for restricting gold smelting Sustainable Development of Enterprises
Topic.
Baking cyaniding tailings not only contains ferrous metal and the non-ferrous metals such as iron, copper, lead, cobalt, nickel, tin, gold, silver, and
It is substantial amounts of nonmetallic, at present, mainly as tailings impoundment or it is used as cement additire materials are inexpensively outer to sell, value is relatively low,
Both environmental pollution is caused, wastes the resource of preciousness again, therefore baking cyaniding tailings is have larger value secondary
Resource, by renovating treatment technology, it is nontoxic to make thing containing cyanogen, heavy metal contaminants clean conversion, reaches solid waste discharge
Stockpiling standard, while synthetical recovery part valuable element, utilization of resources value is improved, the comprehensive profit of environmental protection and resource to China
With being significant.
The content of the invention
The present invention utilizes deficiency existing for technology for existing baking cyaniding tailings, there is provided a kind of baking cyaniding tailings cleaning
The method of conversion.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of method of baking cyaniding tailings clean conversion, it is characterised in that comprise the following steps：
1) primary acids eliminates cyanogen：The cyanidation tailings of baking cyaniding technique output are delivered into one-level to size mixing tank diameter, used
Acid is sized mixing caused by acid making system, and it is 40~48wt% to control pulp density, after from size mixing stirring trench bottom blast air,
2~4kg/m of hydrogen peroxide is added after stirring reaction is abundant thereto3With 1~3kg/m of sodium hypochlorite3, continue to stir haptoreaction；
2) one-level is dehydrated：The ore pulp obtained after reaction in step 1) is terminated is pumped to plate and frame filter press and carries out one-level press filtration
Dehydration, squeezes into liquid storage tank after gained filtrate is neutralized, gained filter cake is delivered to two level through belt and sized mixing tank diameter；
3) two-stage acidulation removes cyanogen：Gained filter cake in step 2) is sized mixing with acid caused by acid making system, controls ore pulp
Concentration is 38~42wt%, after from size mixing stirring trench bottom blast air, added thereto after stirring reaction is abundant hydrogen peroxide 2~
3kg/m3With 1~2kg/m of sodium hypochlorite3, continue to stir haptoreaction；
4) two level is dehydrated：The ore pulp obtained after reaction in step 3) is terminated is pumped to plate and frame filter press and carries out two level press filtration
Dehydration, squeezes into liquid storage tank after gained filtrate is neutralized, gained filter cake is delivered to three-level through belt and sized mixing tank diameter；
5) potent oxidation removes cyanogen：Dilute sulfuric acid caused by the filter cake and acid making system obtained in step 4) is sized mixing, control
Pulp density is 38~42wt%, after from size mixing stirring trench bottom blast air, after add 4~6kg/ of sodium pyrosulfite thereto
m3, 1~2kg/m of hydrogen peroxide3, while supplement 0.5~0.8kg/m of addition copper sulphate3It is catalyzed, control ph is 6~7, stirring
Reaction；
6) magnetic separation：Caused ore pulp in step 5) is pumped to magnetic separator, magnetic occurs in the presence of magnetic field for magnetic ore particle
Gathering and form " magnetic group " or " magnetic linkage ", " magnetic group " or " magnetic linkage " are moved to magnetic pole under magneticaction and are attracted on cylinder,
Unloaded in the case where unloading the flushing flow action of mineral water pipe ejection into iron ore concentrate groove and obtain iron ore concentrate, gained iron ore concentrate takes off after press filtration
Directly outer it can be sold after water, non magnetic and weak magnetic mineral is discharged with ore pulp, is pumped to after plate and frame filter press and is carried out three-level press filtration and take off
Water, squeezes into liquid storage tank after filtrate is neutralized, filtrate cyanide content is reduced to 0.3~0.4mg/L, sold outside gained filter cake cement plant or
Building materials process aerated bricks；
7) wastewater treatment：The dehydration filtrate obtained in liquid storage tank is pumped to gore film technique and carries out filtering and impurity removing, obtains clear
Clean filter water, return to workshop and recycle, do not influence system index.
Further, the 330~450mg/L containing cyanogen of cyanidation tailings described in step 1), 38~43wt% of iron content.
Further, step 1), 3) and 5) described in acid making system caused by acid be sulfuric acid, the concentration of sulfuric acid is 8~
12wt%.
Further, the flow for air being blasted in step 1) and step 3) is 360~380m3/ h, air is blasted in step 5)
Flow be 300~350m3/h。
Further, step 2), 4) and 6) in gained filtrate neutralized using lime.
Further, the time of stirring reaction is 4~5 hours in step 1), and it is small for 1~2.5 to stir the catalytic time
When.
Further, the time of stirring reaction is 3~4 hours in step 3), stirs the catalytic time as 1~2 hour.
Further, the time of stirring reaction is 2~3 hours in step 5).
The beneficial effects of the invention are as follows：
1) multistage subsection acidifying, oxidation are carried out to the thing containing cyanogen in baking cyaniding tailings, multistage potent dehydration removing is handled,
It is that thing containing cyanogen is less than 0.45mg/L in leachate by its clean conversion, stockpiling standard is discharged well below national solid waste；
2) beavy metal impurity ion is made to obtain the pure water of degraded purification by Gore membrane filtration after dehydration filtrate is neutralized,
Filter cake carries out magnetic separator enriched iron respectively by adding increasing magnetic agent after dehydration, total iron content is more than 55%, improves resource profit
With value, baking cyaniding tailings value is improved.
Embodiment
The principle and feature of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment 1：
A kind of method of baking cyaniding tailings clean conversion, comprises the following steps：
1) primary acids eliminates cyanogen：The 330mg/L containing cyanogen of baking cyaniding technique output, iron content 38wt% cyanidation tailings are defeated
Deliver to one-level to size mixing tank diameter, sized mixing using the dilute sulfuric acid of 8wt% caused by acid making system, control the pulp density to be
40wt%, after from size mixing stirring trench bottom blast air, it is 360m to control air mass flow3/ h, stirring reaction after 4 hours thereto
Add hydrogen peroxide 2kg/m3With sodium hypochlorite 1kg/m3, continue to stir haptoreaction 1 hour, amount containing cyanogen is reduced to 100mg/L；
2) one-level is dehydrated：The ore pulp obtained after reaction in step 1) is terminated is pumped to plate and frame filter press and carries out one-level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to two level through belt and sized mixing tank diameter；
3) two-stage acidulation removes cyanogen：The dilute sulfuric acid of gained filter cake and 8wt% caused by acid making system in step 2) is adjusted
Slurry, it is 38wt% control pulp density, after from size mixing stir trench bottom blast air, it is 360m to control air mass flow3/ h, stirring
Reaction adds hydrogen peroxide 2kg/m thereto after 3 hours3With sodium hypochlorite 1kg/m3, continue to stir haptoreaction 1 hour, amount containing cyanogen
It is reduced to 20mg/L；
4) two level is dehydrated：The ore pulp obtained after reaction in step 3) is terminated is pumped to plate and frame filter press and carries out two level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to three-level through belt and sized mixing tank diameter；
5) potent oxidation removes cyanogen：The useless dilute sulfuric acid of 8wt% caused by the filter cake and acid making system obtained in step 4) is carried out
Size mixing, it is 38wt% to control pulp density, after from size mixing stirring trench bottom blast air, it is 300m to control air mass flow3/ h, after
Sodium pyrosulfite 4kg/m is added thereto3, hydrogen peroxide 1kg/m3, while supplement addition copper sulphate 0.5kg/m3It is catalyzed, is controlled
PH value processed is 6, stirring reaction 2 hours；
6) magnetic separation：Caused ore pulp in step 5) is pumped to magnetic separator, magnetic occurs in the presence of magnetic field for magnetic ore particle
Gathering and form " magnetic group " or " magnetic linkage ", " magnetic group " or " magnetic linkage " are moved to magnetic pole under magneticaction and are attracted on cylinder,
Unloaded in the case where unloading the flushing flow action of mineral water pipe ejection into iron ore concentrate groove and obtain iron content 55wt% iron ore concentrate, gained iron essence
Ore deposit directly outer can be sold after small-sized filter press filter-press dehydration, and non magnetic and weak magnetic mineral is discharged with ore pulp, is pumped to sheet frame pressure
Three-level filter-press dehydration is carried out after filter, filtrate squeezes into liquid storage tank after lime neutralizes, cyanide after gained filter cake Cyanide Leaching
Content is reduced to 0.3mg/L, and cement plant or building materials processing aerated bricks are sold outside gained filter cake；
7) wastewater treatment：The dehydration filtrate obtained in liquid storage tank is pumped to gore film technique and carries out filtering and impurity removing, obtains clear
Clean filter water, return to workshop and recycle, do not influence system index.
Embodiment 2：
1) primary acids eliminates cyanogen：The 400mg/L containing cyanogen of baking cyaniding technique output, iron content 40wt% cyanidation tailings are defeated
Deliver to one-level to size mixing tank diameter, sized mixing using the dilute sulfuric acid of 10wt% caused by acid making system, control the pulp density to be
45wt%, after from size mixing stirring trench bottom blast air, it is 370m to control air mass flow3/ h, stirring reaction 4.5 hours it is backward its
Middle addition hydrogen peroxide 3kg/m3With sodium hypochlorite 2kg/m3, continue to stir haptoreaction 2 hours, amount containing cyanogen is reduced to 110mg/L；
2) one-level is dehydrated：The ore pulp obtained after reaction in step 1) is terminated is pumped to plate and frame filter press and carries out one-level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to two level through belt and sized mixing tank diameter；
3) two-stage acidulation removes cyanogen：The dilute sulfuric acid of gained filter cake and 10wt% caused by acid making system in step 2) is adjusted
Slurry, it is 40wt% control pulp density, after from size mixing stir trench bottom blast air, it is 370m to control air mass flow3/ h, stirring
Reaction adds hydrogen peroxide 2.5kg/m thereto after 3.5 hours3With sodium hypochlorite 1.5kg/m3, it is small to continue stirring haptoreaction 1.5
When, amount containing cyanogen is reduced to 30mg/L；
4) two level is dehydrated：The ore pulp obtained after reaction in step 3) is terminated is pumped to plate and frame filter press and carries out two level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to three-level through belt and sized mixing tank diameter；
5) potent oxidation removes cyanogen：10wt% dilute sulfuric acid is adjusted caused by the filter cake and acid making system obtained in step 4)
Slurry, it is 40wt% control pulp density, after from size mixing stir trench bottom blast air, it is 330m to control air mass flow3/ h, backward
Wherein add sodium pyrosulfite 5kg/m3, hydrogen peroxide 1.5kg/m3, while supplement addition copper sulphate 0.7kg/m3It is catalyzed, is controlled
PH value processed is 7, stirring reaction 2.5 hours；
6) magnetic separation：Caused ore pulp in step 5) is pumped to magnetic separator, magnetic occurs in the presence of magnetic field for magnetic ore particle
Gathering and form " magnetic group " or " magnetic linkage ", " magnetic group " or " magnetic linkage " are moved to magnetic pole under magneticaction and are attracted on cylinder,
Unloaded in the case where unloading the flushing flow action of mineral water pipe ejection into iron ore concentrate groove and obtain iron ore concentrate, gained iron ore concentrate takes off after press filtration
Directly outer it can be sold after water, non magnetic and weak magnetic mineral is discharged with ore pulp, is pumped to after plate and frame filter press and is carried out three-level press filtration and take off
Water, filtrate squeeze into liquid storage tank after lime neutralizes, and cyanide content is reduced to 0.35mg/L, gained filter after gained filter cake Cyanide Leaching
Cement plant or building materials processing aerated bricks are sold outside cake；
7) wastewater treatment：The dehydration filtrate obtained in liquid storage tank is pumped to gore film technique and carries out filtering and impurity removing, obtains clear
Clean filter water, return to workshop and recycle, do not influence system index.
Embodiment 3：
1) primary acids eliminates cyanogen：The 450mg/L containing cyanogen of baking cyaniding technique output, iron content 43wt% cyanidation tailings are defeated
Deliver to one-level to size mixing tank diameter, sized mixing using the dilute sulfuric acid of 12wt% caused by acid making system, control the pulp density to be
48wt%, after from size mixing stirring trench bottom blast air, it is 380m to control air mass flow3/ h, stirring reaction after 5 hours thereto
Add hydrogen peroxide 4kg/m3With sodium hypochlorite 3kg/m3, continue to stir haptoreaction 2.5 hours, thing containing cyanogen is reduced to 120mg/L；
2) one-level is dehydrated：The ore pulp obtained after reaction in step 1) is terminated is pumped to plate and frame filter press and carries out one-level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to two level through belt and sized mixing tank diameter；
3) two-stage acidulation removes cyanogen：The dilute sulfuric acid of gained filter cake and 12wt% caused by acid making system in step 2) is adjusted
Slurry, it is 42wt% control pulp density, after from size mixing stir trench bottom blast air, it is 380m to control air mass flow3/ h, stirring
Reaction adds hydrogen peroxide 3kg/m thereto after 4 hours3With sodium hypochlorite 2kg/m3, continue to stir haptoreaction 2 hours, thing containing cyanogen
It is reduced to 40mg/L；
4) two level is dehydrated：The ore pulp obtained after reaction in step 3) is terminated is pumped to plate and frame filter press and carries out two level press filtration
Dehydration, gained filtrate squeeze into liquid storage tank after lime neutralizes, and gained filter cake is delivered to three-level through belt and sized mixing tank diameter；
5) potent oxidation removes cyanogen：The useless dilute sulfuric acid of 12wt% caused by the filter cake and acid making system obtained in step 4) is carried out
Size mixing, it is 42wt% to control pulp density, after from size mixing stirring trench bottom blast air, it is 350m to control air mass flow3/ h, after
Sodium pyrosulfite 6kg/m is added thereto3, hydrogen peroxide 2kg/m3, while supplement addition copper sulphate 0.8kg/m3It is catalyzed, is controlled
PH value processed is 7, stirring reaction fully reaction in 3 hours；
6) magnetic separation：Caused ore pulp in step 5) is pumped to magnetic separator, magnetic occurs in the presence of magnetic field for magnetic ore particle
Gathering and form " magnetic group " or " magnetic linkage ", " magnetic group " or " magnetic linkage " are moved to magnetic pole under magneticaction and are attracted on cylinder,
Unloaded in the case where unloading the flushing flow action of mineral water pipe ejection into iron ore concentrate groove and obtain iron ore concentrate, gained iron ore concentrate takes off after press filtration
Directly outer it can be sold after water, non magnetic and weak magnetic mineral is discharged with ore pulp, is pumped to after plate and frame filter press and is carried out three-level press filtration and take off
Water, filtrate squeeze into liquid storage tank after lime neutralizes, and the content of thing containing cyanogen is reduced to 0.40mg/L, gained filter after gained filter cake Cyanide Leaching
Cement plant or building materials processing aerated bricks are sold outside cake；
7) wastewater treatment：The dehydration filtrate obtained in liquid storage tank is pumped to gore film technique and carries out filtering and impurity removing, obtains clear
Clean filter water, return to workshop and recycle, do not influence system index.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (8)
- A kind of 1. method of baking cyaniding tailings clean conversion, it is characterised in that comprise the following steps：1) primary acids eliminates cyanogen：The cyanidation tailings of baking cyaniding technique output are delivered into one-level to size mixing tank diameter, use relieving haperacidity Acid is sized mixing caused by system, and it is 40~48wt% to control pulp density, after from one-level size mixing stirring trench bottom blast air, 2~4kg/m of hydrogen peroxide is added after stirring reaction is abundant thereto3With 1~3kg/m of sodium hypochlorite3, continue to stir haptoreaction；2) one-level is dehydrated：The ore pulp obtained after reaction in step 1) is terminated is pumped to plate and frame filter press progress one-level press filtration and taken off Water, squeezes into liquid storage tank after gained filtrate is neutralized, gained filter cake is delivered to two level through belt and sized mixing tank diameter；3) two-stage acidulation removes cyanogen：Gained filter cake in step 2) is sized mixing with acid caused by acid making system, controls pulp density For 38~42wt%, after from two level stirring trench bottom of sizing mixing blast air, added thereto after stirring reaction is abundant hydrogen peroxide 2~ 3kg/m3With 1~2kg/m of sodium hypochlorite3, continue to stir haptoreaction；4) two level is dehydrated：The ore pulp obtained after reaction in step 3) is terminated is pumped to plate and frame filter press progress two level press filtration and taken off Water, squeezes into liquid storage tank after gained filtrate is neutralized, gained filter cake is delivered to three-level through belt and sized mixing tank diameter；5) potent oxidation removes cyanogen：Acid caused by the filter cake and acid making system obtained in step 4) is sized mixing, and controls pulp density For 38~42wt%, after from three-level stirring trench bottom of sizing mixing blast air, after add 4~6kg/m of sodium pyrosulfite thereto3、 1~2kg/m of hydrogen peroxide3, while supplement 0.5~0.8kg/m of addition copper sulphate3It is catalyzed, control ph is 6~7, and stirring is anti- Should；6) magnetic separation：Caused ore pulp in step 5) is pumped to magnetic separator, magnetic ore particle occur in the presence of magnetic field magnetic it is poly- and Formed " magnetic group " or " magnetic linkage ", " magnetic group " or " magnetic linkage " are moved to magnetic pole under magneticaction and are attracted on cylinder, unloading Unloaded under the flushing flow action that mineral water pipe sprays into iron ore concentrate groove and obtain iron ore concentrate, gained iron ore concentrate can after filter-press dehydration Directly outer to sell, non magnetic and weak magnetic mineral is discharged with ore pulp, and three-level filter-press dehydration, filtrate are carried out after being pumped to plate and frame filter press Liquid storage tank is squeezed into after neutralized, filtrate cyanide content is reduced to 0.3~0.4mg/l, sells cement plant outside gained filter cake or building materials add Work produces aerated bricks；7) wastewater treatment：The dehydration filtrate obtained in liquid storage tank is pumped to gore film technique and carries out filtering and impurity removing, is cleaned Drainage, return to workshop and recycle, do not influence system index.
- 2. the method for baking cyaniding tailings clean conversion according to claim 1, it is characterised in that cyanogen described in step 1) Change tailings 330~450mg/L containing cyanogen, 38~43wt% of iron content.
- 3) and 5) 3. the method for baking cyaniding tailings clean conversion according to claim 1, it is characterised in that step 1), Described in acid making system caused by acid be sulfuric acid, the concentration of sulfuric acid is 8~12wt%.
- 4. the method for baking cyaniding tailings clean conversion according to claim 1, it is characterised in that step 1) and step 3) In to blast the flow of air be 360~380m3/ h, the flow that air is blasted in step 5) is 300~350m3/h。
- 4) and 6) 5. the method for baking cyaniding tailings clean conversion according to claim 1, it is characterised in that step 2), Middle gained filtrate is neutralized using lime.
- 6. the method for the baking cyaniding tailings clean conversion according to any one of claim 1-5, it is characterised in that step 1) time of stirring reaction is 4~5 hours in, stirs the catalytic time as 1~2.5 hour.
- 7. the method for the baking cyaniding tailings clean conversion according to any one of claim 1-5, it is characterised in that step 3) time of stirring reaction is 3~4 hours in, stirs the catalytic time as 1~2 hour.
- 8. the method for the baking cyaniding tailings clean conversion according to any one of claim 1-5, it is characterised in that step 5) time of stirring reaction is 2~3 hours in.
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| CN108246494A (en) * | 2018-01-11 | 2018-07-06 | 江苏盐城环保科技城重金属防治研究中心 | A kind of method for detaching iron in high ferro cyanidation tailings |
| CN108588439B (en) * | 2018-04-09 | 2019-11-05 | 中南大学 | A kind of method of cyanide in removal cyanide residue |
| CN109675914A (en) * | 2019-01-30 | 2019-04-26 | 中城华宇（北京）矿业技术有限公司 | A kind of cyanidation tailings method for innocent treatment and device |
| CN109967495A (en) * | 2019-03-28 | 2019-07-05 | 长春黄金研究院有限公司 | A kind of reverse dense purification method of gold concentrate smelting enterprise cyanogen slag three-level |
| CN110052482A (en) * | 2019-05-25 | 2019-07-26 | 光大环保能源(沛县)有限公司 | A kind of ash residue treatment technology after environmental debris power generation |
| CN110251879A (en) * | 2019-07-05 | 2019-09-20 | 科盛环保科技股份有限公司 | A kind of decyanation system and method for cyanamide waste residue |
| CN111184977A (en) * | 2020-01-03 | 2020-05-22 | 常州工学院 | Stabilizing treatment method for cyanide-containing waste salt slag |
| CN113604673B (en) * | 2021-08-11 | 2022-09-20 | 山东国大黄金股份有限公司 | Method for extracting gold from sulfuric acid curing roasting cyanidation tailings |
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| US4966715A (en) * | 1989-05-19 | 1990-10-30 | Degussa Aktiengesellschaft | Process for the removal of cyanide from wastewaters |
| CN101759274B (en) * | 2010-01-11 | 2012-01-04 | 长春黄金研究院 | Recycling and harmless treatment method for cyaniding tailing slurry |
| CN104926036A (en) * | 2015-06-12 | 2015-09-23 | 长春黄金研究院 | Cyanogen-containing tailing slag treatment method |
| CN105000720A (en) * | 2015-08-23 | 2015-10-28 | 长春黄金研究院 | Method for treating cyaniding tailing slurry in gold smelting industry |
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